Link attributes versus relationship attributes
You can use links and relationships between catalogs and items.
The following table describes the different performance characteristics for both links and
relationship attributes.
| Links attributes | Relationship attributes |
|---|---|
| Used in item objects only | Used in both item and category objects |
| Associated through the primary key of the target item | Associated through the internal ID of the target item |
| Can be associated to an item that does not exist yet | Cannot be associated to an item that does not exist yet in target catalog |
| Targets a catalog that is identified at design time (in catalog attributes) | Targets a catalog that is chosen at run time |
| Limited to the primary spec | Can be used in primary and secondary specs |